Six Arms, the strongest fighters in the most powerful criminal organization, can't even see Sebas one-shot one them until he's splattered across the ground behind them, think they can measure people's strength from a glance? They clearly don't know what they're talking about.
@Beastmanga I looked through the last 8 or 9 pages and I can't see where that is even slightly hinted at, is it really, really subtle or is it just implied?